1. National Engineering Research Center for Biomaterials College of Biomedical Engineering Sichuan University Chengdu Sichuan 610064 China
2. Institute of Regulatory Science for Medical Devices Sichuan University Chengdu Sichuan 610065 China
3. Department of Neurosurgery West China School of Medicine West China Hospital Sichuan University Chengdu Sichuan 610041 China
4. Core Facilities of West China Hospital Sichuan University Chengdu Sichuan 610041 China
5. The Center of Gerontology and Geriatrics West China Hospital Sichuan University Chengdu Sichuan 610044 China